Yotta-
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Look up yotta- in Wiktionary, the free dictionary. |
Yotta is the largest decimal unit prefix in the metric system, denoting a factor of 1024 or 1000000000000000000000000; that is, one million million million million, or one septillion. It has the unit symbol Y. The prefix name is derived from the Ancient Greek οκτώ (októ), meaning "eight", because it is equal to 1,0008. It was added as an SI prefix to the International System of Units (SI) in 1991.[1]
Usage examples:
- The mass of the Earth is 5,972.6 Yg.[2]
- The mass of the oceans is about 1.4 Yg.[3]
- The total power output of the Sun is approximately 385 YW.[4]
- The observable universe is estimated to be 880 Ym in diameter.[5]
- One yottabyte (YB) is a unit of digital information or information storage capacity that contains one septillion bytes or 1,000 zettabytes. The yobibyte (YiB) is a related unit that uses a binary prefix, and means 1,0248 bytes, which is approximately 1.2 septillion bytes.
|
Prefix |
1000m |
10n |
Decimal |
English word |
Adoption[nb 1] |
Name |
Symbol |
Short scale |
Long scale |
yotta |
Y |
10008 |
1024 |
1000000000000000000000000 |
septillion |
quadrillion |
1991 |
zetta |
Z |
10007 |
1021 |
1000000000000000000000 |
sextillion |
thousand trillion or trilliard |
1991 |
exa |
E |
10006 |
1018 |
1000000000000000000 |
quintillion |
trillion |
1975 |
peta |
P |
10005 |
1015 |
1000000000000000 |
quadrillion |
thousand billion or billiard |
1975 |
tera |
T |
10004 |
1012 |
1000000000000 |
trillion |
billion |
1960 |
giga |
G |
10003 |
109 |
1000000000 |
billion |
thousand million or milliard |
1960 |
mega |
M |
10002 |
106 |
1000000 |
million |
1960 (1873) |
kilo |
k |
10001 |
103 |
1000 |
thousand |
1960 (1795) |
hecto |
h |
10002/3 |
102 |
100 |
hundred |
1960 (1795) |
deca |
da |
10001/3 |
101 |
10 |
ten |
1960 (1795) |
|
10000 |
100 |
1 |
one |
– |
deci |
d |
1000−1/3 |
10−1 |
0.1 |
tenth |
1960 (1795) |
centi |
c |
1000−2/3 |
10−2 |
0.01 |
hundredth |
1960 (1795) |
milli |
m |
1000−1 |
10−3 |
0.001 |
thousandth |
1960 (1795) |
micro |
μ |
1000−2 |
10−6 |
0.000001 |
millionth |
1960 (1873) |
nano |
n |
1000−3 |
10−9 |
0.000000001 |
billionth |
thousand millionth |
1960 |
pico |
p |
1000−4 |
10−12 |
0.000000000001 |
trillionth |
billionth |
1960 |
femto |
f |
1000−5 |
10−15 |
0.000000000000001 |
quadrillionth |
thousand billionth |
1964 |
atto |
a |
1000−6 |
10−18 |
0.000000000000000001 |
quintillionth |
trillionth |
1964 |
zepto |
z |
1000−7 |
10−21 |
0.000000000000000000001 |
sextillionth |
thousand trillionth |
1991 |
yocto |
y |
1000−8 |
10−24 |
0.000000000000000000000001 |
septillionth |
quadrillionth |
1991 |
|
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- ↑ The metric system was introduced in 1795 with several metric prefixes, of which, however, only six were adopted as SI prefixes by the 11th CGPM conference in 1960, whereas myria (104) as well as double and demi were not adopted. In 1873, micro and mega were recommended by the British Association for the Advancement of Science. The other dates relate to recognition by a resolution of the CGPM.
See also
References
External links
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Look up yotta- in Wiktionary, the free dictionary. |